Spectrophotometric Determination of Mixtures of Neptunium(IV) and Neptunium(V) in Nitric Acid Solutions

Description

The absorption spectra of Np(IV), Np(V), and Np(VI) were measured in 1M HNO/sub 3/ and a spectrophotometric method of analysis was devised for mixtures of Np(IV) and Np(V) in nitric acid solution. In the analysis, the absorption of Np(IV) was measured at the sharp absorption band at about 715 m mu and the absorption of Np(V) was measured at 617 m mu . A novel adaptation of a Beckman DU spectrophotometer permitted the neptunium solutions to be confined in a gloved box so that the instrument was not exposed to possible contamination by the alpha activity of Np/sup 237/. (auth)

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Description

The absorption spectra of Np(IV), Np(V), and Np(VI) were measured in 1M HNO/sub 3/ and a spectrophotometric method of analysis was devised for mixtures of Np(IV) and Np(V) in nitric acid solution. In the analysis, the absorption of Np(IV) was measured at the sharp absorption band at about 715 m mu and the absorption of Np(V) was measured at 617 m mu . A novel adaptation of a Beckman DU spectrophotometer permitted the neptunium solutions to be confined in a gloved box so that the instrument was not exposed to possible contamination by the alpha activity of Np/sup 237/. (auth)

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